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s390/fs3270: fix screen reset on activate 

fs3270 uses EWRITEA to clear the screen when a user opens /dev/3270/tub.
However it misses the attribute byte after the EWRITEA, so (at least)
x3270 complains about 'Record too short, missing write flags'.
Add the missing flag byte to fix this.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Sven Schnelle 2022-12-05 12:32:02 +01:00 committed by Heiko Carstens
parent ec40213bfb
commit a554dbd740
1 changed files with 7 additions and 6 deletions
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13
drivers/s390/char/fs3270.c
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@ -122,16 +122,19 @@ static int fs3270_activate(struct raw3270_view *view)
if (!raw3270_request_final(fp->init))
return 0;
raw3270_request_set_cmd(fp->init, TC_EWRITEA);
raw3270_request_set_idal(fp->init, fp->rdbuf);
fp->init->rescnt = 0;
cp = fp->rdbuf->data[0];
if (fp->rdbuf_size == 0) {
/* No saved buffer. Just clear the screen. */
raw3270_request_set_cmd(fp->init, TC_EWRITEA);
fp->init->ccw.count = 1;
fp->init->callback = fs3270_reset_callback;
cp[0] = 0;
} else {
/* Restore fullscreen buffer saved by fs3270_deactivate. */
raw3270_request_set_cmd(fp->init, TC_EWRITEA);
raw3270_request_set_idal(fp->init, fp->rdbuf);
fp->init->ccw.count = fp->rdbuf_size;
cp = fp->rdbuf->data[0];
fp->init->callback = fs3270_restore_callback;
cp[0] = TW_KR;
cp[1] = TO_SBA;
cp[2] = cp[6];
@ -140,8 +143,6 @@ static int fs3270_activate(struct raw3270_view *view)
cp[5] = TO_SBA;
cp[6] = 0x40;
cp[7] = 0x40;
fp->init->rescnt = 0;
fp->init->callback = fs3270_restore_callback;
}
rc = raw3270_start_locked(view, fp->init);
fp->init->rc = rc;